The agreement which led to the formation of the West African Clearing House was signed in? by Sunday | Dec 25 | Commerce WAEC | 0 comments A. Gambia B. Sierra Leone C. Nigeria D. Ghana Correct Answer: Option B – Sierra Leone Users Also Read These:Mr Chidi insured his house against fire. The house…The New production sharing contracts (PSCs)…In 1991; the African Economic Community Treaty was…The West African house was established to?The West African Clearing House (WACH) was established to?